An Arizona man and his 3-year-old daughter were killed and two other family members were injured Thursday in a head-on vehicle crash on Highway 101 south of Ukiah.

Jonathan Arroyo, 26, of Vail and the girl were killed when a delivery van driven by Emmanuel Barajas, 22, of Santa Rosa crossed a grassy highway median into their traffic lane just after 11 a.m., the CHP said.

Jonathan Arroyo was driving a Cadillac, officials said.

Barajas, who works for Nissan in Petaluma, was not injured, Officer Steve Krul said.

He was arrested on suspicion of vehicular manslaughter, he said. Krul did not know whether Barajas was suspected of driving under the influence.

Two passengers in the Cadillac were injured. Arroyo's wife, Kristin, 27, suffered minor injuries. Her 1-year-old daughter, identified as Adalyn Arroyo by the Ukiah Daily Journal, suffered moderate injuries. The child was flown to Children's Hospital in Oakland for treatment, Krul said.

The crash limited traffic on Highway 101 to a single lane in each direction for more than five hours, the CHP said.

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